The mole fraction of krypton in dry air near sea level is 0.00000114 where the molar mass of krypton is 83.80. The concentration of krypton in the atmosphere is ________ ppm.
A) 8.77 × 1011
B) 1.14 × 10-4
C) 1140
D) 1.14
E) 1.14 × 10-12
Correct Answer:
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